The February ISO was the last official release, which supports the i686 architecture, so we need to create monthly(?) ISOs on its own. Until 2017 November, we can use the official i686 repository to build the ISO. The task is simple: we can use the official [archiso](https://git.archlinux.org/archiso.git/) tool to procedure ISO images. After [this change](https://lists.archlinux.org/pipermail/arch-releng/2017-January/003763.html) is committed, we simple need to replace `x86_64` with `i686`, and run the command with the default configuration, which will procedures a working i686 ISO hopefully. If further customization is needed, then we could create a git repository for our archiso configuration.